This method is registered in a special way so ClassDB doesn't naturally know about its existence. Here it is hardcoded if any other option fail to check if it is about the `free()` method and, if so, say it exists and return a Callable.
GDScript integration tests
The scripts/ folder contains integration tests in the form of GDScript files
and output files.
See the Integration tests for GDScript documentation for information about creating and running GDScript integration tests.